[Federal Register Volume 90, Number 103 (Friday, May 30, 2025)]
[Proposed Rules]
[Pages 22938-22942]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2025-09730]


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DEPARTMENT OF TRANSPORTATION

Federal Motor Carrier Safety Administration

49 CFR Part 393

[Docket No. FMCSA-2025-0119]
RIN 2126-AC93


Parts and Accessories Necessary for Safe Operation; Brakes on 
Portable Conveyors

AGENCY: Federal Motor Carrier Safety Administration (FMCSA), Department 
of Transportation (DOT).

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: FMCSA proposes to add an exception for portable conveyors used 
in aggregate industry operations, and manufactured before 2010, from 
the requirements that each commercial motor vehicle (CMV) be equipped 
with brakes acting on all wheels, provided certain conditions are 
satisfied. This proposal is in response to a petition for rulemaking 
from the Michigan Aggregates Association (MAA). The proposed change 
would provide relief from a regulatory requirement for certain portable 
conveyors without impacting safety.

DATES: Comments must be received on or before July 29, 2025.

ADDRESSES: You may submit comments identified by Docket Number FMCSA-
2025-0119 using any of the following methods:
     Federal eRulemaking Portal: Go to https://www.regulations.gov/docket/FMCSA-2025-0119/document. Follow the online 
instructions for submitting comments.
     Mail: Dockets Operations, U.S. Department of 
Transportation, 1200 New Jersey Avenue SE, West Building, Ground Floor, 
Washington, DC 20590-0001.
     Hand Delivery or Courier: Dockets Operations, U.S. 
Department of Transportation, 1200 New Jersey Avenue SE, West Building, 
Ground Floor, Washington, DC 20590-0001, between 9 a.m. and 5 p.m., 
Monday through Friday, except Federal holidays. To be sure someone is 
there to help you, please call (202) 366-9317 or (202) 366-9826 before 
visiting Dockets Operations.
     Fax: (202) 493-2251.

FOR FURTHER INFORMATION CONTACT: Mr. David Sutula, Chief, Vehicle and 
Roadside Operations Division, FMCSA, 1200 New Jersey Avenue SE, 
Washington, DC 20590 0001; (202) 366-9209; [email protected]. If you 
have questions on viewing or submitting material to the docket, call 
Dockets Operations at (202) 366-9826.

SUPPLEMENTARY INFORMATION: FMCSA organizes this NPRM as follows:

I. Public Participation and Request for Comments
    A. Submitting Comments
    B. Viewing Comments and Documents
    C. Privacy
II. Abbreviations
III. Legal Basis
IV. Background
V. Discussion of Proposed Rulemaking
VI. International Impacts
VII. Section-by-Section Analysis
VIII. Regulatory Analyses
    A. E.O. 12866 (Regulatory Planning and Review), E.O. 13563 
(Improving Regulation and Regulatory Review), and DOT Regulatory 
Policies and Procedures
    B. E.O. 14192 (Unleashing Prosperity Through Deregulation)
    C. Advance Notice of Proposed Rulemaking
    D. Regulatory Flexibility Act
    E. Assistance for Small Entities
    F. Unfunded Mandates Reform Act of 1995
    G. Paperwork Reduction Act
    H. E.O. 13132 (Federalism)
    I. Privacy
    J. E.O. 13175 (Indian Tribal Governments)
    K. National Environmental Policy Act of 1969
    L. Rulemaking Summary

I. Public Participation and Request for Comments

A. Submitting Comments

    If you submit a comment, please include the docket number for this 
NPRM (FMCSA-2025-0119), indicate the specific section of this document 
to which your comment applies, and provide a reason for each suggestion 
or recommendation. You may submit your comments and material online or 
by fax, mail, or hand delivery, but please use only one of these means. 
FMCSA recommends that you include your name and a mailing address, an 
email address, or a phone number in the body of your document so FMCSA 
can contact you if there are questions regarding your submission.
    To submit your comment online, go to https://www.regulations.gov/docket/FMCSA-2025-0119/document, click on this NPRM, click ``Comment,'' 
and type your comment into the text box on the following screen.
    If you submit your comments by mail or hand delivery, submit them 
in an unbound format, no larger than 8\1/2\ by 11 inches, suitable for 
copying and electronic filing.
    FMCSA will consider all comments and material received during the 
comment period.

[[Page 22939]]

Confidential Business Information (CBI)
    CBI is commercial or financial information that is both customarily 
and actually treated as private by its owner. Under the Freedom of 
Information Act (5 U.S.C. 552), CBI is exempt from public disclosure. 
If your comments responsive to the NPRM contain commercial or financial 
information that is customarily treated as private, that you actually 
treat as private, and that is relevant or responsive to the NPRM, it is 
important that you clearly designate the submitted comments as CBI. 
Please mark each page of your submission that constitutes CBI as 
``PROPIN'' to indicate it contains proprietary information. FMCSA will 
treat such marked submissions as confidential under the Freedom of 
Information Act, and they will not be placed in the public docket of 
the NPRM. Submissions containing CBI should be sent to Brian Dahlin, 
Chief, Regulatory Evaluation Division, Office of Policy, FMCSA, 1200 
New Jersey Avenue SE, Washington, DC 20590-0001 or via email at 
[email protected]. At this time, you need not send a duplicate 
hardcopy of your electronic CBI submissions to FMCSA headquarters. Any 
comments FMCSA receives not specifically designated as CBI will be 
placed in the public docket for this rulemaking.

B. Viewing Comments and Documents

    To view any documents mentioned as being available in the docket, 
go to https://www.regulations.gov/docket/FMCSA-2025-0119/document and 
choose the document to review. To view comments, click this NPRM, then 
click ``Browse Comments.'' If you do not have access to the internet, 
you may view the docket online by visiting Dockets Operations on the 
ground floor of the DOT West Building, 1200 New Jersey Avenue SE, 
Washington, DC 20590-0001, between 9 a.m. and 5 p.m., Monday through 
Friday, except Federal holidays. To be sure someone is there to help 
you, please call (202) 366-9317 or (202) 366-9826 before visiting 
Dockets Operations.

C. Privacy

    In accordance with 5 U.S.C. 553(c), DOT solicits comments from the 
public to better inform its regulatory process. DOT posts these 
comments, including any personal information the commenter provides, to 
www.regulations.gov as described in the system of records notice DOT/
ALL 14 (Federal Docket Management System (FDMS)), which can be reviewed 
at https://www.transportation.gov/individuals/privacy/privacy-act-system-records-notices. The comments are posted without edits and are 
searchable by the name of the submitter.

II. Abbreviations

ANPRM Advanced notice of proposed rulemaking
CMV Commercial motor vehicle
DOT Department of Transportation
FMCSA Federal Motor Carrier Safety Administration
FMCSRs Federal Motor Carrier Safety Regulations
FR Federal Register
MAA Michigan Aggregates Association
MPH Miles per hour
NPRM Notice of proposed rulemaking
PIA Privacy Impact Assessment
PTA Privacy Threshold Assessment
UMRA The Unfunded Mandates Reform Act of 1995
U.S.C. United States Code

III. Legal Basis

    Under 49 U.S.C. 31136(a), DOT is required to ``prescribe minimum 
safety standards for commercial motor vehicles. At a minimum, the 
regulations shall ensure that--``(1) commercial motor vehicles are 
maintained, equipped, loaded, and operated safely; (2) the 
responsibilities imposed on operators of commercial motor vehicles do 
not impair their ability to operate the vehicles safely; (3) the 
physical condition of operators of commercial motor vehicles is 
adequate to enable them to operate the vehicles safely . . .; (4) the 
operation of commercial motor vehicles does not have a deleterious 
effect on the physical condition of the operators; and (5) an operator 
of a commercial motor vehicle is not coerced by a motor carrier, 
shipper, receiver, or transportation intermediary to operate a 
commercial motor vehicle in violation of a regulation promulgated under 
this section [which is the basis for much of the FMCSRs], or chapter 51 
or chapter 313 of this title.''
    This NPRM is based on the authority of 49 U.S.C. 31136(a)(1) to 
ensure that CMVs are equipped and operated safely. It does not 
implicate the driver-centered requirements of 49 U.S.C. 31136(a)(2) 
through (4). Because this NPRM would create an exception to a 
requirement for brakes, there is no obvious risk of coercion related to 
this proposed rule to which a driver might be subjected.
    Commercial motor vehicles are defined in 49 CFR 390.5 to include 
``any self-propelled or towed motor vehicle used on a highway in 
interstate commerce to transport passengers or property when the 
vehicle--(1) Has a gross vehicle weight rating or gross combination 
weight rating, or gross vehicle weight or gross combination weight, if 
4,536 kg (10,001 pounds) or more, whichever is greater.'' The portable 
conveyors addressed by this NPRM and their towing vehicles have gross 
combination weights of 10,001 pounds or more, and are thus CMVs.
    For the reasons explained below, FMCSA believes that exempting 
portable conveyors from the requirement in Sec.  393.42(a) to have 
brakes acting on all wheels (under the conditions proposed) would not 
adversely affect the operational safety of combinations including such 
conveyors.

IV. Background

    Requirements that CMVs be equipped with various parts and 
accessories are established in 49 CFR part 393, ``Parts and Accessories 
Necessary for Safe Operation.'' Specifically, Sec.  393.42 requires 
that each CMV be equipped with brakes acting on all wheels. This 
section currently includes six exceptions, based mainly on either the 
age of the vehicle (for example, three-axle vehicles manufactured prior 
to 1980 do not require brakes on the steering axle) or the weight of 
the vehicle (for example, a trailer with a gross weight of 3,000 lbs. 
or less does not require brakes). Other exceptions are for driveaway 
towaway vehicles and specialized trailers transporting extremely heavy 
equipment (e.g., industrial furnaces, reactors, etc.) at speeds not 
exceeding 20 miles per hour (mph).
    On January 18, 2019, MAA submitted a petition for rulemaking 
requesting a revision to Sec.  393.42 to add portable conveyors to the 
list of vehicles that are not required to have brakes on all wheels. 
FMCSA granted the MAA petition on September 9, 2024, and the revision 
requested in that petition is addressed in this rulemaking.

V. Discussion of Proposed Rulemaking

    The MAA petition requested that FMCSA add an exception for portable 
conveyors to the requirements in Sec.  393.42(b). MAA stated that, 
prior to 2010, portable conveyors were not manufactured with brakes 
because the drum brakes used at the time would trap sand, rocks, and 
other materials found in aggregate pits, which would render the brakes 
useless. That material would also tend to dislodge during transport, 
creating a road hazard. Manufacturers now install disc braking systems 
on portable conveyors, but conveyors manufactured before 2010 cannot be 
retrofitted with these newer brakes. MAA stated that the aggregate 
industry has maintained a good safety record while transporting the 
brakeless portable conveyors in the past.

[[Page 22940]]

    FMCSA is proposing to add the requested exception to Sec.  393.42. 
The Agency examined inspection violations data related to Sec.  393.42 
and focused on violations related to missing brakes on the trailer axle 
for the years 2020 to first quarter of 2024. The data showed that total 
percentage of all violations related to Sec.  393.42 amounted to less 
than 0.06 percent of all CMV violations. More specifically, violations 
related to missing brakes on a trailer axle were less than 0.001 
percent of all violations. There is no crash data to indicate if 
portable aggregate conveyors have been a primary cause of crashes.
    The towing vehicle and portable conveyer would still need to meet 
the stopping performance required by Sec.  393.52(d). The combination 
would be required to stop within 40 feet or less from an initial speed 
of 20 mph. The FMCSRs do not specify minimum stopping distances from 
higher speeds. However, because of the length of the conveyors, motor 
carriers will often have to request overlength permits from the States 
in which they operate, and in many of those cases the permits contain 
restrictions on maximum speed. Further, most towing vehicles are 
equipped with either disc brakes or a combination of disc and drum 
brakes on wheels, which have improved the stopping distances by 30 
percent since 2013, after the adoption of FMVSS No. 121 (see 74 FR 
37122 and 78 FR 9623; July 27, 2009).
    FMCSA proposes imposing two additional conditions to the exception 
to ensure these conveyors continue to be transported safely. First, 
FMCSA proposes requiring that the sum of the axle weights of the towed 
vehicle not exceed 40 percent of the sum of the axle weights of the 
towing vehicle to ensure that stability is maintained during transport. 
Second, FMCSA proposes that the maximum speed be limited to 45 mph on 
two lane roads and 55 mph on freeways. Because the towing vehicle plus 
the portable conveyor must still meet the brake performance standards 
in Sec.  393.52, which is stopping from 20 mph within 40 feet, and the 
fact that these portable conveyors will seldom be transported on the 
highway due to their primary use offroad, FMCSA believes that these 
conveyors can be transported safely without brakes.

VI. International Impacts

    Motor carriers and drivers are subject to the laws and regulations 
of the countries that they operate in, unless an international 
agreement states otherwise. Drivers and carriers should be aware of the 
regulatory differences between nations.

VII. Section-by-Section Analysis

    This section-by-section analysis describes the proposed changes in 
numerical order.

Section 393.42 Brakes Required on all Wheels

    FMCSA proposes to add new paragraphs (b)(7)(i) through (iii) which 
would provide an exception for portable conveyors manufactured prior to 
2010.

VIII. Regulatory Analyses

A. Executive Order (E.O.) 12866 (Regulatory Planning and Review), E.O. 
13563 (Improving Regulation and Regulatory Review), and DOT Regulatory 
Policies and Procedures

    FMCSA has considered the impact of this NPRM under E.O. 12866 (58 
FR 51735, Oct. 4, 1993), Regulatory Planning and Review, E.O. 13563 (76 
FR 3821, Jan. 21, 2011), Improving Regulation and Regulatory Review, 
and DOT Regulatory Policies and Procedures. The Office of Information 
and Regulatory Affairs within the Office of Management and Budget (OMB) 
determined that this NPRM is not a significant regulatory action under 
section 3(f) of E.O. 12866, as supplemented by E.O. 13563, and does not 
require an assessment of potential costs and benefits under section 
6(a)(3) of that order. Accordingly, OMB has not reviewed it under that 
E.O.
    The proposed rule would add an exception to the requirement for 
brakes on all wheels for portable conveyors manufactured prior to 2010. 
The towing vehicle and the portable conveyor would still need to meet 
the stopping performance required by Sec.  393.52(d). Furthermore, most 
towing vehicles are now equipped with disc brakes or a combination of 
disc and drum brakes on wheels, which have improved stopping distances 
by 30 percent since 2013 after the adoption of FMVSS No. 121 (see 74 FR 
37122 and 78 FR 9623). That advancement in braking technology further 
diminished the necessity for brakes on pre-2010 portable conveyors. 
Consequently, FMCSA determines that this proposed rule would have no 
impact on safety. The proposed rule is anticipated to generate cost 
savings for owners of pre-2010 portable conveyors by enhancing their 
economic viability and potentially extending their useful lifespan.

B. E.O. 14192 (Unleashing Prosperity Through Deregulation)

    E.O. 14192 (90 FR 9065, Jan. 31, 2025), Unleashing Prosperity 
Through Deregulation, requires that for ``each new [E.O. 14192 
regulatory action] issued, at least ten prior regulations be identified 
for elimination.'' \1\
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    \1\ Executive Office of the President. Executive Order 14192 of 
January 31, 2025. Unleashing Prosperity Through Deregulation. 90 FR 
9065-9067. Feb. 6, 2025.
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    Implementation guidance for E.O. 14192 issued by OMB (Memorandum M-
25-20, March 26, 2025) defines two different types of E.O. 14192 
actions: an E.O. 14192 deregulatory action, and an E.O. 14192 
regulatory action.\2\
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    \2\ Executive Office of the President. Office of Management and 
Budget. Guidance Implementing Section 3 of Executive Order 14192, 
Titled ``Unleashing Prosperity Through Deregulation.'' Memorandum M-
25-20. March 26, 2025.
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    An E.O. 14192 deregulatory action is defined as ``an action that 
has been finalized and has total costs less than zero.'' This proposed 
rulemaking is expected to have total costs less than zero, and 
therefore would be considered an E.O. 14192 deregulatory action upon 
issuance of a final rule.

C. Advance Notice of Proposed Rulemaking

    Under 49 U.S.C. 31136(g), FMCSA is required to publish an advance 
notice of proposed rulemaking (ANPRM) or proceed with a negotiated 
rulemaking, if a proposed safety rule ``under this part'' \3\ is likely 
to lead to the promulgation of a major rule.\4\ As this proposed rule 
is not likely to result in the promulgation of a major rule, the Agency 
is not required to issue an ANPRM or to proceed with a negotiated 
rulemaking.
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    \3\ Part B of Subtitle VI of Title 49, United States Code, i.e., 
49 U.S.C. chapters 311-317.
    \4\ A major rule means any rule that the Office of Management 
and Budget finds has resulted in or is likely to result in (a) an 
annual effect on the economy of $100 million or more; (b) a major 
increase in costs or prices for consumers, individual industries, 
geographic regions, Federal, State, or local government agencies; or 
(c) significant adverse effects on competition, employment, 
investment, productivity, innovation, or on the ability of United 
States-based enterprises to compete with foreign-based enterprises 
in domestic and export markets (5 U.S.C. 804(2)).
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D. Regulatory Flexibility Act

    The Regulatory Flexibility Act (5 U.S.C. 601 et seq.), as amended 
by the Small Business Regulatory Enforcement Fairness Act of 1996,\5\ 
requires Federal agencies to consider the effects of the regulatory 
action on small business and other small entities and to minimize any 
significant economic impact. The term small entities comprises small 
businesses and not-for-profit organizations that are independently 
owned and operated and are not dominant in their fields, and 
governmental jurisdictions with

[[Page 22941]]

populations of less than 50,000 (5 U.S.C. 601(6)). Accordingly, DOT 
policy requires an analysis of the impact of all regulations on small 
entities, and mandates that agencies strive to lessen any adverse 
effects on these businesses.
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    \5\ Public Law 104-121, 110 Stat. 857 (Mar. 29, 1996).
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    No regulatory flexibility analysis is required, however, if the 
head of an agency or an appropriate designee certifies that the rule 
will not have a significant economic impact on a substantial number of 
small entities. This proposed rulemaking will add an exception to the 
requirement for brakes on all wheels for portable conveyors 
manufactured prior to 2010. By extending this regulatory relief, owners 
of pre-2010 portable conveyors may experience some cost savings. FMCSA 
considers any realized cost savings to be de minimis. The Agency 
requests data or any other information that could assist in quantifying 
these costs savings. Consequently, I certify that the proposed action 
would not have a significant economic impact on a substantial number of 
small entities.

E. Assistance for Small Entities

    In accordance with section 213(a) of the Small Business Regulatory 
Enforcement Fairness Act of 1996 (Pub. L. 104-121, 110 Stat. 857), 
FMCSA wants to assist small entities in understanding this proposed 
rule so they can better evaluate its effects on themselves and 
participate in the rulemaking initiative. If the proposed rule would 
affect your small business, organization, or governmental jurisdiction 
and you have questions concerning its provisions or options for 
compliance, please consult the person listed under FOR FURTHER 
INFORMATION CONTACT.
    Small businesses may send comments on the actions of Federal 
employees who enforce or otherwise determine compliance with Federal 
regulations to the Small Business Administration's Small Business and 
Agriculture Regulatory Enforcement Ombudsman (Office of the National 
Ombudsman, see https://www.sba.gov/about-sba/oversight-advocacy/office-national-ombudsman) and the Regional Small Business Regulatory Fairness 
Boards. The Ombudsman evaluates these actions annually and rates each 
agency's responsiveness to small business. If you wish to comment on 
actions by employees of FMCSA, call 1-888-REG-FAIR (1-888-734-3247). 
DOT has a policy regarding the rights of small entities to regulatory 
enforcement fairness and an explicit policy against retaliation for 
exercising these rights.

F. Unfunded Mandates Reform Act of 1995

    The Unfunded Mandates Reform Act of 1995 (2 U.S.C. 1531-1538) 
(UMRA) requires Federal agencies to assess the effects of their 
discretionary regulatory actions. The Act addresses actions that may 
result in the expenditure by a State, local, or Tribal government, in 
the aggregate, or by the private sector of $206 million (which is the 
value equivalent of $100 million in 1995, adjusted for inflation to 
2024 levels) or more in any 1 year. Because this proposed rule would 
not result in such an expenditure, a written statement is not required.

G. Paperwork Reduction Act

    This proposed rule contains no new information collection 
requirements under the Paperwork Reduction Act of 1995 (44 U.S.C. 3501-
3520).

H. E.O. 13132 (Federalism)

    A rule has implications for federalism under section 1(a) of E.O. 
13132 if it has ``substantial direct effects on the States, on the 
relationship between the national government and the States, or on the 
distribution of power and responsibilities among the various levels of 
government.''
    FMCSA has determined that this proposed rule would not have 
substantial direct costs on or for States, nor would it limit the 
policymaking discretion of States. Nothing in this document preempts 
any State law or regulation. Therefore, this proposed rule does not 
have sufficient federalism implications to warrant the preparation of a 
Federalism Impact Statement.

I. Privacy

    The Consolidated Appropriations Act, 2005,\6\ requires the Agency 
to assess the privacy impact of a regulation that will affect the 
privacy of individuals. This NPRM would not require the collection of 
personally identifiable information.
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    \6\ Public Law 108-447, 118 Stat. 2809, 3268, note following 5 
U.S.C. 552a (Dec. 4, 2014).
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    The Privacy Act (5 U.S.C. 552a) applies only to Federal agencies 
and any non-Federal agency that receives records contained in a system 
of records from a Federal agency for use in a matching program.
    The E-Government Act of 2002,\7\ requires Federal agencies to 
conduct a Privacy Impact Assessment (PIA) for new or substantially 
changed technology that collects, maintains, or disseminates 
information in an identifiable form. No new or substantially changed 
technology would collect, maintain, or disseminate information as a 
result of this rulemaking. Accordingly, FMCSA has not conducted a PIA.
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    \7\ Public Law 107-347, sec. 208, 116 Stat. 2899, 2921 (Dec. 17, 
2002).
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    In addition, the Agency will complete a Privacy Threshold 
Assessment (PTA) to evaluate the risks and effects the proposed 
rulemaking might have on collecting, storing, and sharing personally 
identifiable information. The PTA will be submitted to FMCSA's Privacy 
Officer for review and preliminary adjudication and to DOT's Privacy 
Officer for review and final adjudication.

J. E.O. 13175 (Indian Tribal Governments)

    This proposed rule does not have Tribal implications under E.O. 
13175, Consultation and Coordination with Indian Tribal Governments, 
because it does not have a substantial direct effect on one or more 
Indian Tribes, on the relationship between the Federal Government and 
Indian Tribes, or on the distribution of power and responsibilities 
between the Federal Government and Indian Tribes.

K. National Environmental Policy Act of 1969

    FMCSA analyzed this proposed rule pursuant to the National 
Environmental Policy Act of 1969 (42 U.S.C. 4321 et seq.). The Agency 
believes this proposed rule, if finalized, would not have a reasonably 
foreseeable significant effect on the quality of the human environment. 
This action would likely fall under a published categorical exclusion 
and thus be excluded from further analysis and documentation in an 
environmental assessment or environmental impact statement under FMCSA 
Order 5610.1 (69 FR 9680), Appendix 2. Specifically, paragraph (6)(bb), 
which covers regulations pertaining to vehicle operation safety 
standards, equipment approval, and/or equipment carriage requirements. 
The public is invited to comment on the impact of the proposed Agency 
action.

L. Rulemaking Summary

    In accordance with 5 U.S.C. 553(b)(4), a summary of this proposed 
rule may be found at regulations.gov, under the docket number.

List of Subjects in 49 CFR Part 393

    Highway safety, Motor carriers, Motor vehicle safety.

    Accordingly, FMCSA proposes to amend 49 CFR part 393 to read as 
follows:

[[Page 22942]]

PART 393--PARTS AND ACCESSORIES NECESSARY FOR SAFE OPERATION

0
1. The authority citation for part 393 continues to read as follows:

    Authority:  49 U.S.C. 31136, 31151, 31502; sec. 1041(b), Pub. L. 
102-240, 105 Stat. 1914, 1993; secs. 5301 and 5524, Pub. L. 114-94, 
129 Stat. 1312, 1543, 1560; and 49 CFR 1.87.

0
2. Amend Sec.  393.42 by adding paragraph (b)(7) to read as follows:


Sec.  393.42  Brakes required on all wheels.

* * * * *
    (b) * * *
    (7) Portable conveyors manufactured prior to 2010 and used by the 
aggregate industry are not required to be equipped with brakes on all 
wheels provided:
    (i) The combination of portable conveyor and towing vehicle meet 
the performance requirement in 49 CFR 393.52;
    (ii) The sum of the axle weights of the towed vehicle does not 
exceed 40 percent of the sum of the axle weights of the towing vehicle; 
and
    (iii) The maximum speed of the portable conveyor and towing vehicle 
is limited to 45 miles per hour (mph) on two lane roads and 55 mph on 
freeways.

    Issued under authority delegated in 49 CFR 1.87.
Sue Lawless,
Assistant Administrator.
[FR Doc. 2025-09730 Filed 5-27-25; 4:15 pm]
BILLING CODE 4910-EX-P